Commit e3a037a5 authored by Mathias Nyman's avatar Mathias Nyman Committed by Greg Kroah-Hartman

usb: misc: usbtest: fix pattern tests for scatterlists.

commit cdc77c82 upstream.

The current implemenentation restart the sent pattern for each entry in
the sg list. The receiving end expects a continuous pattern, and test
will fail unless scatterilst entries happen to be aligned with the
pattern

Fix this by calculating the pattern byte based on total sent size
instead of just the current sg entry.
Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Fixes: 8b524901 ("[PATCH] USB: usbtest: scatterlist OUT data pattern testing")
Acked-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 51c31279
......@@ -505,6 +505,7 @@ static struct scatterlist *
alloc_sglist(int nents, int max, int vary, struct usbtest_dev *dev, int pipe)
{
struct scatterlist *sg;
unsigned int n_size = 0;
unsigned i;
unsigned size = max;
unsigned maxpacket =
......@@ -537,7 +538,8 @@ alloc_sglist(int nents, int max, int vary, struct usbtest_dev *dev, int pipe)
break;
case 1:
for (j = 0; j < size; j++)
*buf++ = (u8) ((j % maxpacket) % 63);
*buf++ = (u8) (((j + n_size) % maxpacket) % 63);
n_size += size;
break;
}
......
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